ROK International Industry Co., Limited provide top quality API (American Petroleum Institute, which is trade association for the oil and natural gas industry) standard, including four types, Namely, LP, UPTBG, TBG, BCSG. These oil field screw thread gauges are available as working screw thread gages or master screw thread gages. These Gauges are manufactured to check the petroleum pipe thread. It is very importan, as piple connection is very important for drilling, or transport. ROK supply gauge compliant and/or licensed to Spec Q1, Spec 5B, Spec 7 and Spec 11B

LP (Line Pipe)

Line pipe is made to transport natural gas, oil and water, ranging from 1/8' to 10'

Order No.

Size

Outside Dia.

Taper

RGPG-14001

1/8

3.18

1:16

RGPG-14002

1/4

6.35

1:16

RGPG-14003

3/8

9.53

1:16

RGPG-14004

1/2

12.70

1:16

RGPG-14005

3/4

19.05

1:16

RGPG-14006

1

25.40

1:16

RGPG-14007

1 1/4

31.75

1:16

RGPG-14008

1 1/2

38.10

1:16

RGPG-14009

2

50.80

1:16

RGPG-14010

2 1/2

63.50

1:16

RGPG-14011

3

76.20

1:16

RGPG-14012

3 1/2

88.90

1:16

RGPG-14013

4

101.60

1:16

RGPG-14014

5

127.00

1:16

RGPG-14015

6

152.40

1:16

RGPG-14016

8

203.20

1:16

RGPG-14017

10

254.00

1:16

API Petroleum Thread Gauge UPTBG

Order No.

Size

Outside Dia

Taper

RGPG-13001

1.050

22.67

1:16

RGPG-13002

1.315

33.40

1:16

RGPG-13003

1.660

42.16

1:16

RGPG-13004

1.900

48.26

1:16

RGPG-13005

2 3/8

60.33

1:16

RGPG-13006

2 7/8

73.03

1:16

RGPG-13007

3 1/2

88.90

1:16

RGPG-13008

4

101.60

1:16

RGPG-13009

4 1/2

114.30

1:16

API Thread Gages (TBG)

Order No.

Size

Outside Dia

Taper

RGPG-10001

1.050

26.67

1:16

RGPG-10002

1.315

33.40

1:16

RGPG-10003

1.660

42.16

1:16

RGPG-10004

1.900

48.26

1:16

RGPG-10005

2 3/8

60.33

1:16

RGPG-10006

2 7/8

73.03

1:16

RGPG-10007

3 1/2

88.90

1:16

RGPG-10008

4

101.60

1:16

RGPG-10009

4 1/2

114.30

1:16

API Petroleum Thread Gauge (BCSG)

Order No.

Size

Outside Dia

Taper

RGPG-11001

4 - 1/2

114.30

1:16

RGPG-11002

5

127.00

1:16

RGPG-11003

5 1/2

139.70

1:16

RGPG-11004

6 5/8

168.28

1:16

RGPG-11005

7

177.80

1:16

RGPG-11006

7 5/8

193.68

1:16

RGPG-11007

8 5/8

219.08

1:16

RGPG-11008

9 5/8

244.48

1:16

RGPG-11009

10 3/4

273.05

1:16

RGPG-11010

11 3/4

298.45

1:16

RGPG-11011

13 3/4

339.73

1:16

RGPG-11012

16

406.4

1:16

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